Annealing and cooling treatment system for two-stage hot wind circulation of glass ceramic tunnel crystallization kiln

Abstract

The invention belongs to the technical filed of glass ceramic annealing by a sintering method, and discloses an annealing and cooling treatment system for two-stage hot wind circulation of a glass ceramic tunnel crystallization kiln. The treatment system is characterized in that the upper part and the lower part of kiln walls at two sides of a quench zone are respectively installed with a row of fast cold wind blowing openings which are communicated with fast cold wind blowing opening branch pipes, the fast cold wind blowing openings are all communicated with the output ports of second hot wind circulation pipes; the kiln walls at two sides of the slow cooling segment of a cooling zone are respectively provided with three rows of hot circulation wind blowing openings which are communicated with the hot circulation wind blowing opening branch pipes, all hot circulation wind blowing opening branch pipes are communicated with the output ports of first hot wind circulation pipes; the first hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the first hot wind circulation pipes; and the second hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the second hot wind circulation pipes. The annealing and cooling treatment system can improve product quality, and reduce deformation, burst and other defects of the products.

Description

Technical field [0001] The invention belongs to the technical field of annealing of sintering method glass-ceramics. Specifically, it relates to an annealing and cooling treatment system of a tunnel crystallization furnace for sintering method glass-ceramics. Background technique [0002] The well-known sintering and crystallization process of architectural decoration glass-ceramics is as follows: glass particles are laid flat in a mold composed of refractory materials, and then pushed into a kiln for sintering, crystallization, annealing and cooling. The structure of the kiln refers to the traditional ceramic tunnel kiln. Therefore, the cooling method of the products in the tunnel kiln usually adopts a combination of direct and indirect cooling methods. The product can be rapidly cooled in the range of 1120℃ to 950℃, and the product is quenched by the cold air sprayed by the rapid cooling barrier air curtain. The slow cooling stage is from 850℃~400℃, and the product is cooled by...

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Problems solved by technology

At the same time, in the cooling process, the cooling speed of the edge of the product is often too fast, and the middle is slow. The thermal stress caused by uneven cooling cannot be eliminated by the viscous flow of the particles. When the stress is too large, the product will also crack.

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